<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
<body>
    <span>中国大陆   </span>&nbsp;&nbsp;&nbsp;
    {% if not user %}
    <span> <a href="/login?user=吕布">亲，请登录</a>   </span>
    <span>免费注册   </span>
    {% else %}
    <span>欢迎您，{{ user }}   </span>
    {% endif %}
    <span>手机逛淘   </span>
</body>
</html>